You probably mean what is the simplest form of sqrt 45....?
45=3x3x5
3x3 is a square number, so
sqrt45=sqrt(9*5)=sqrt(9)*sqrt(5)=3*sqrt(5)
* indicates multiplication
sqrt indicates a square root (also known as a surd (in the english national curriculum) or a radical...apparently
3 radical 5
12 radical 2
No.
radical 89 cannot be simplified.
4 radical 6
6 radical 6
√97, which cannot be simplified.
There is no radical to simplify!
2 radical(8) = 4 radical(2)
Nothing it is simplified
5 radical 2 (5√2)
radical 36 = square root 36 = 6